8x4 Inches General Purpose Printed Circuit Zero Board Black Wire On the first rotation of

On the first rotation of the shaft the pole-A rotates from 1st to 2nd pin and the pole-C rotates from 7th to 8th pin and so on

The desoldering pump is built with a double ring double open and "vacuum" button

Although it is a 3

or to a microcontroller

Tap Module/ Knock Sensor: KY-031

8x4 Inches General Purpose Printed Circuit Zero Board Black Wire On the first rotation ofIt's a 8x4 Inches General Purpose Printed Circuit Zero Board. This is commonly known as Perf Board, Practice Board, General Purpose PCB, and Zero Board. The plated holes are pre tinned pre coppered and very solid, making them very easy to solder components on. It is Widely Used For Electronic Projects. Features Actual size: 20mx10cm (8 Inches x 4 Inches) Model Number: Univolt Economy KS 84 This Is A Single Sided Fr2 Phenolic General Purpose PCB It Is